homoeoteleuton-like errors without the features

It seems to me an important observation that in considering the existing variant units, there will always be some that aren't identified as homoeoteleuton-like accidental errors, because they lack the obvious features.

That is, our list of homeoteleuton errors will always be smaller than the actual number caused by line-skip/eye-slip mistakes. Some will always get through, and leave us puzzling as to what actually happened, when actually it was just another scribal blunder.

We should always consequently suspect that a significant number of other variant units are also simply clumsy omissions, and this option ought to be considered in almost every case of apparent omission/addition, even when features may suggest by coincidence that the omission/addition was deliberate or theologically influenced.